Polished Black Tourmaline Freeform Hyalite Opal underwater look

underwater look

resulting in breathtaking formations of purple crystals

A perfect addition to any mineral collection and a unique piece for display

Size: ~8cm x 6cm x 6cm

Polished Black Tourmaline Freeform Hyalite Opal underwater lookThis is a polished black tourmaline Freeform. It's a naturally dark, opaque black color. You'll find that it has a smooth feel from being polished. Its hard to take a good picture due to the polish. An interesting fact about tourmaline is that it's a pyroelectric and piezoelectric mineral. This means it can generate an electrical charge when heated or when subjected to pressure. This property was actually known for centuries, with early Dutch traders